Tribblix: manual page: CURLSHOPT

CURLSHOPT_UNLOCKFUNC(3) Introduction to Library Functions

NAME

CURLSHOPT_UNLOCKFUNC - mutex unlock callback

SYNOPSIS

#include <curl/curl.h>

void unlockcb(CURL *handle, curl_lock_data data, void *clientp);

CURLSHcode curl_share_setopt(CURLSH *share, CURLSHOPT_UNLOCKFUNC, unlockcb);

DESCRIPTION

Set a mutex unlock callback for the share object. There is a
corresponding CURLSHOPT_LOCKFUNC(3) callback called when the mutex is
first locked.

The unlockcb argument must be a pointer to a function matching the
prototype shown above. The arguments to the callback are:

handle is the currently active easy handle in use when the share
object is released.

The data argument tells what kind of data libcurl wants to unlock.
Make sure that the callback uses a different lock for each kind of
data.

clientp is the private pointer you set with CURLSHOPT_USERDATA(3).
This pointer is not used by libcurl itself.

PROTOCOLS

This functionality affects all supported protocols

EXAMPLE

extern void mutex_unlock(CURL *, curl_lock_data, void *);

int main(void)
{
CURLSHcode sh;
CURLSH *share = curl_share_init();
sh = curl_share_setopt(share, CURLSHOPT_UNLOCKFUNC, mutex_unlock);
if(sh)
printf("Error: %s\n", curl_share_strerror(sh));
}

AVAILABILITY

Added in curl 7.10.3

RETURN VALUE

CURLSHE_OK (zero) means that the option was set properly, non-zero
means an error occurred. See libcurl-errors(3) for the full list with
descriptions.